{"id":476853,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:35","modified_gmt":"2023-09-05T11:13:35","slug":"discretionary-access-control","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/discretionary-access-control\/","title":{"rendered":"Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd"},"content":{"rendered":"

Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd (DAC) l\u00e0 m\u1ed9t lo\u1ea1i h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t truy c\u1eadp cung c\u1ea5p ch\u00ednh s\u00e1ch truy c\u1eadp \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi ch\u1ee7 s\u1edf h\u1eefu d\u1eef li\u1ec7u ho\u1eb7c t\u00e0i nguy\u00ean. Ch\u1ee7 s\u1edf h\u1eefu c\u00f3 to\u00e0n quy\u1ec1n c\u1ea5p ho\u1eb7c t\u1eeb ch\u1ed1i quy\u1ec1n truy c\u1eadp cho ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c quy tr\u00ecnh kh\u00e1c.<\/p>\n

Ngu\u1ed3n g\u1ed1c v\u00e0 s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

Kh\u00e1i ni\u1ec7m Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd c\u00f3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u ti\u00ean c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh d\u00f9ng chung, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong h\u1ec7 th\u1ed1ng Multics (D\u1ecbch v\u1ee5 m\u00e1y t\u00ednh v\u00e0 th\u00f4ng tin \u0111a k\u00eanh) \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1960. H\u1ec7 th\u1ed1ng Multics bao g\u1ed3m m\u1ed9t d\u1ea1ng DAC th\u00f4 s\u01a1, sau n\u00e0y tr\u1edf th\u00e0nh ngu\u1ed3n c\u1ea3m h\u1ee9ng cho c\u00e1c h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t truy c\u1eadp hi\u1ec7n \u0111\u1ea1i. DAC \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t kh\u00e1i ni\u1ec7m ch\u00ednh th\u1ee9c v\u1edbi vi\u1ec7c ph\u00e1t h\u00e0nh \u201cS\u00e1ch Cam\u201d c\u1ee7a B\u1ed9 Qu\u1ed1c ph\u00f2ng Hoa K\u1ef3 v\u00e0o nh\u1eefng n\u0103m 1980, trong \u0111\u00f3 x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 c\u1ea5p \u0111\u1ed9 ki\u1ec3m so\u00e1t an ninh, bao g\u1ed3m c\u1ea3 DAC.<\/p>\n

M\u1edf r\u1ed9ng s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean t\u1eafc v\u1ec1 \u0111\u1eb7c quy\u1ec1n t\u00f9y \u00fd. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 c\u00e1 nh\u00e2n ho\u1eb7c t\u1ed5 ch\u1ee9c s\u1edf h\u1eefu d\u1eef li\u1ec7u ho\u1eb7c t\u00e0i nguy\u00ean c\u00f3 quy\u1ec1n quy\u1ebft \u0111\u1ecbnh ai c\u00f3 th\u1ec3 truy c\u1eadp d\u1eef li\u1ec7u ho\u1eb7c t\u00e0i nguy\u00ean \u0111\u00f3. Ki\u1ec3m so\u00e1t n\u00e0y c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng cho c\u1ea3 quy\u1ec1n \u0111\u1ecdc v\u00e0 ghi. Theo DAC, danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp (ACL) \u0111\u01b0\u1ee3c duy tr\u00ec, trong \u0111\u00f3 ch\u1ec9 \u0111\u1ecbnh lo\u1ea1i quy\u1ec1n truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c nh\u00f3m ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed1i v\u1edbi m\u1ed9t t\u00e0i nguy\u00ean c\u1ee5 th\u1ec3.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

M\u00f4 h\u00ecnh DAC ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o hai th\u00e0nh ph\u1ea7n ch\u00ednh: Danh s\u00e1ch \u0111i\u1ec1u khi\u1ec3n truy c\u1eadp (ACL) v\u00e0 b\u1ea3ng kh\u1ea3 n\u0103ng. ACL \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u1eebng t\u00e0i nguy\u00ean ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 ch\u1ee9a danh s\u00e1ch c\u00e1c ch\u1ee7 th\u1ec3 (ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c quy tr\u00ecnh) c\u00f9ng v\u1edbi c\u00e1c quy\u1ec1n \u0111\u01b0\u1ee3c c\u1ea5p c\u1ee7a h\u1ecd. M\u1eb7t kh\u00e1c, c\u00e1c b\u1ea3ng kh\u1ea3 n\u0103ng duy tr\u00ec m\u1ed9t danh s\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 m\u1ed9t ch\u1ee7 th\u1ec3 c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 truy c\u1eadp.<\/p>\n

Khi y\u00eau c\u1ea7u quy\u1ec1n truy c\u1eadp \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n, h\u1ec7 th\u1ed1ng DAC s\u1ebd ki\u1ec3m tra ACL ho\u1eb7c b\u1ea3ng kh\u1ea3 n\u0103ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem ng\u01b0\u1eddi y\u00eau c\u1ea7u c\u00f3 \u0111\u01b0\u1ee3c ph\u00e9p truy c\u1eadp t\u00e0i nguy\u00ean hay kh\u00f4ng. N\u1ebfu ACL ho\u1eb7c b\u1ea3ng kh\u1ea3 n\u0103ng c\u1ea5p quy\u1ec1n truy c\u1eadp th\u00ec y\u00eau c\u1ea7u s\u1ebd \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn. Ng\u01b0\u1ee3c l\u1ea1i, n\u00f3 b\u1ecb t\u1eeb ch\u1ed1i.<\/p>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n
    \n
  1. Quy\u1ec1n truy c\u1eadp do ch\u1ee7 s\u1edf h\u1eefu x\u00e1c \u0111\u1ecbnh<\/strong>: Ch\u1ee7 s\u1edf h\u1eefu d\u1eef li\u1ec7u ho\u1eb7c t\u00e0i nguy\u00ean x\u00e1c \u0111\u1ecbnh ai c\u00f3 th\u1ec3 truy c\u1eadp n\u00f3.<\/li>\n
  2. Danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp<\/strong>: ACL x\u00e1c \u0111\u1ecbnh lo\u1ea1i quy\u1ec1n truy c\u1eadp m\u00e0 m\u1ed7i ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c nh\u00f3m ng\u01b0\u1eddi d\u00f9ng c\u00f3.<\/li>\n
  3. B\u1ea3ng kh\u1ea3 n\u0103ng<\/strong>: C\u00e1c b\u1ea3ng n\u00e0y li\u1ec7t k\u00ea c\u00e1c t\u00e0i nguy\u00ean m\u00e0 ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c nh\u00f3m ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp.<\/li>\n
  4. Uy\u1ec3n chuy\u1ec3n<\/strong>: Ch\u1ee7 s\u1edf h\u1eefu c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng thay \u0111\u1ed5i quy\u1ec1n theo y\u00eau c\u1ea7u.<\/li>\n
  5. Ki\u1ec3m so\u00e1t truy c\u1eadp b\u1eafc c\u1ea7u<\/strong>: N\u1ebfu ng\u01b0\u1eddi d\u00f9ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean, h\u1ecd c\u00f3 th\u1ec3 c\u1ea5p quy\u1ec1n truy c\u1eadp cho ng\u01b0\u1eddi d\u00f9ng kh\u00e1c.<\/li>\n<\/ol>\n

    C\u00e1c lo\u1ea1i ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

    M\u1eb7c d\u00f9 DAC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tri\u1ec3n khai theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau nh\u01b0ng hai c\u00e1ch ti\u1ebfp c\u1eadn ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 ACL v\u00e0 danh s\u00e1ch kh\u1ea3 n\u0103ng.<\/p>\n\n\n\n\n\n\n
    Ti\u1ebfp c\u1eadn<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
    Danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp (ACL)<\/td>\nACL \u0111\u01b0\u1ee3c g\u1eafn v\u1edbi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng (v\u00ed d\u1ee5: m\u1ed9t t\u1ec7p) v\u00e0 ch\u1ec9 \u0111\u1ecbnh ng\u01b0\u1eddi d\u00f9ng n\u00e0o c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 nh\u1eefng thao t\u00e1c n\u00e0o h\u1ecd c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n tr\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3.<\/td>\n<\/tr>\n
    Danh s\u00e1ch n\u0103ng l\u1ef1c<\/td>\nDanh s\u00e1ch kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c g\u1eafn v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 ch\u1ec9 \u0111\u1ecbnh nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0 nh\u1eefng thao t\u00e1c n\u00e0o h\u1ecd c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n tr\u00ean c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u1ee8ng d\u1ee5ng, th\u00e1ch th\u1ee9c v\u00e0 gi\u1ea3i ph\u00e1p ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

    DAC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 h\u1ec7 th\u1ed1ng t\u1ec7p, ch\u1eb3ng h\u1ea1n nh\u01b0 Windows v\u00e0 UNIX, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng chia s\u1ebb t\u1ec7p v\u00e0 t\u00e0i nguy\u00ean v\u1edbi c\u00e1c c\u00e1 nh\u00e2n ho\u1eb7c nh\u00f3m \u0111\u01b0\u1ee3c ch\u1ecdn.<\/p>\n

    M\u1ed9t th\u00e1ch th\u1ee9c l\u1edbn v\u1edbi DAC l\u00e0 \u201cv\u1ea5n \u0111\u1ec1 c\u1ea5p ph\u00f3 b\u1ed1i r\u1ed1i\u201d, trong \u0111\u00f3 m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh c\u00f3 th\u1ec3 v\u00f4 t\u00ecnh l\u00e0m r\u00f2 r\u1ec9 quy\u1ec1n truy c\u1eadp. V\u00ed d\u1ee5: ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 l\u1eeba m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh c\u00f3 nhi\u1ec1u quy\u1ec1n truy c\u1eadp h\u01a1n \u0111\u1ec3 thay m\u1eb7t h\u1ecd th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng. V\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u b\u1eb1ng c\u00e1ch l\u1eadp tr\u00ecnh c\u1ea9n th\u1eadn v\u00e0 s\u1eed d\u1ee5ng h\u1ee3p l\u00fd c\u00e1c \u0111\u1eb7c quy\u1ec1n h\u1ec7 th\u1ed1ng.<\/p>\n

    M\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u00e1c l\u00e0 kh\u1ea3 n\u0103ng lan truy\u1ec1n nhanh ch\u00f3ng, kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp, v\u00ec ng\u01b0\u1eddi d\u00f9ng c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean c\u00f3 th\u1ec3 c\u1ea5p quy\u1ec1n truy c\u1eadp \u0111\u00f3 cho ng\u01b0\u1eddi kh\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft th\u00f4ng qua gi\u00e1o d\u1ee5c v\u00e0 \u0111\u00e0o t\u1ea1o ph\u00f9 h\u1ee3p c\u0169ng nh\u01b0 c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t \u1edf c\u1ea5p h\u1ec7 th\u1ed1ng \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ef1 l\u00e2y lan nh\u01b0 v\u1eady.<\/p>\n

    So s\u00e1nh Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd v\u1edbi c\u00e1c \u0111i\u1ec1u kho\u1ea3n t\u01b0\u01a1ng t\u1ef1<\/h2>\n\n\n\n\n\n\n\n
    Thu\u1eadt ng\u1eef<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
    Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd (DAC)<\/td>\nCh\u1ee7 s\u1edf h\u1eefu c\u00f3 to\u00e0n quy\u1ec1n ki\u1ec3m so\u00e1t d\u1eef li\u1ec7u v\u00e0 t\u00e0i nguy\u00ean c\u1ee7a h\u1ecd.<\/td>\n<\/tr>\n
    Ki\u1ec3m so\u00e1t truy c\u1eadp b\u1eaft bu\u1ed9c (MAC)<\/td>\nCh\u00ednh s\u00e1ch t\u1eadp trung h\u1ea1n ch\u1ebf quy\u1ec1n truy c\u1eadp d\u1ef1a tr\u00ean c\u1ea5p \u0111\u1ed9 ph\u00e2n lo\u1ea1i.<\/td>\n<\/tr>\n
    Ki\u1ec3m so\u00e1t truy c\u1eadp d\u1ef1a tr\u00ean vai tr\u00f2 (RBAC)<\/td>\nQuy\u1ec1n truy c\u1eadp \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi vai tr\u00f2 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng trong t\u1ed5 ch\u1ee9c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

    T\u01b0\u01a1ng lai c\u1ee7a DAC c\u00f3 th\u1ec3 s\u1ebd ph\u00e1t tri\u1ec3n v\u1edbi s\u1ef1 ph\u1ed5 bi\u1ebfn ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a c\u00e1c n\u1ec1n t\u1ea3ng d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y v\u00e0 c\u00e1c thi\u1ebft b\u1ecb Internet of Things (IoT). Ki\u1ec3m so\u00e1t truy c\u1eadp chi ti\u1ebft h\u01a1n, cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t chi ti\u1ebft h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c quy\u1ec1n, d\u1ef1 ki\u1ebfn s\u1ebd tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn h\u01a1n. Ngo\u00e0i ra, khi c\u00f4ng ngh\u1ec7 m\u00e1y h\u1ecdc v\u00e0 AI ph\u00e1t tri\u1ec3n, ch\u00fang ta c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c h\u1ec7 th\u1ed1ng DAC c\u00f3 th\u1ec3 h\u1ecdc h\u1ecfi v\u00e0 th\u00edch \u1ee9ng v\u1edbi nhu c\u1ea7u truy c\u1eadp lu\u00f4n thay \u0111\u1ed5i.<\/p>\n

    M\u00e1y ch\u1ee7 proxy v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/h2>\n

    M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nguy\u00ean t\u1eafc DAC \u0111\u1ec3 ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean web. V\u00ed d\u1ee5: m\u1ed9t c\u00f4ng ty c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp m\u1ed9t m\u00e1y ch\u1ee7 proxy \u0111\u1ec3 ki\u1ec3m tra danh t\u00ednh v\u00e0 vai tr\u00f2 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng tr\u01b0\u1edbc khi cho ph\u00e9p truy c\u1eadp v\u00e0o m\u1ed9t s\u1ed1 trang web ho\u1eb7c d\u1ecbch v\u1ee5 d\u1ef1a tr\u00ean web nh\u1ea5t \u0111\u1ecbnh. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u1ec9 nh\u1eefng nh\u00e2n vi\u00ean \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n m\u1edbi c\u00f3 th\u1ec3 truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean tr\u1ef1c tuy\u1ebfn c\u1ee5 th\u1ec3, cung c\u1ea5p th\u00eam m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt.<\/p>\n

    Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n
      \n
    1. An ninh m\u00e1y t\u00ednh: Ngh\u1ec7 thu\u1eadt v\u00e0 Khoa h\u1ecdc<\/a> c\u1ee7a Matt Bishop: M\u1ed9t ngu\u1ed3n t\u00e0i nguy\u00ean to\u00e0n di\u1ec7n v\u1ec1 b\u1ea3o m\u1eadt m\u00e1y t\u00ednh, bao g\u1ed3m c\u1ea3 ki\u1ec3m so\u00e1t truy c\u1eadp.<\/li>\n
    2. Hi\u1ec3u v\u00e0 s\u1eed d\u1ee5ng Ki\u1ec3m so\u00e1t truy c\u1eadp t\u00f9y \u00fd<\/a>: B\u00e0i vi\u1ebft c\u1ee7a CSO, t\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 DAC.<\/li>\n
    3. \u1ea4n ph\u1ea9m \u0111\u1eb7c bi\u1ec7t c\u1ee7a NIST 800-12<\/a>: H\u01b0\u1edbng d\u1eabn v\u1ec1 b\u1ea3o m\u1eadt m\u00e1y t\u00ednh c\u1ee7a Vi\u1ec7n Ti\u00eau chu\u1ea9n v\u00e0 C\u00f4ng ngh\u1ec7 Qu\u1ed1c gia Hoa K\u1ef3, bao g\u1ed3m ph\u1ea7n th\u1ea3o lu\u1eadn v\u1ec1 DAC.<\/li>\n
    4. M\u00f4 h\u00ecnh ki\u1ec3m so\u00e1t truy c\u1eadp<\/a>: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1c m\u00f4 h\u00ecnh ki\u1ec3m so\u00e1t truy c\u1eadp kh\u00e1c nhau c\u1ee7a O'Reilly Media.<\/li>\n
    5. DAC, MAC v\u00e0 RBAC<\/a>: B\u00e0i b\u00e1o khoa h\u1ecdc so s\u00e1nh c\u00e1c m\u00f4 h\u00ecnh DAC, MAC, RBAC.<\/li>\n<\/ol>","protected":false},"featured_media":476854,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476853","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Discretionary Access Control: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is Discretionary Access Control (DAC)?","answer":"

      Discretionary Access Control (DAC) is a type of access control system where the access policy is determined by the owner of the data or resource. The owner has the discretion to grant or deny access to other users or processes.<\/p>"},{"question":"When was Discretionary Access Control first introduced?","answer":"

      The concept of Discretionary Access Control dates back to the earliest days of shared computing systems, particularly in the Multics (Multiplexed Information and Computing Service) system developed in the 1960s. DAC became a formalized concept with the release of the United States Department of Defense's \"Orange Book\" in the 1980s.<\/p>"},{"question":"How does Discretionary Access Control work?","answer":"

      Discretionary Access Control works based on Access Control Lists (ACLs) and capability tables. When an access request is made, the DAC system checks the ACL or the capability table to verify if the requester is allowed to access the resource.<\/p>"},{"question":"What are the key features of Discretionary Access Control?","answer":"

      The key features of Discretionary Access Control include owner-determined access, the use of Access Control Lists and capability tables, flexibility in permissions, and the principle of transitive access control.<\/p>"},{"question":"What types of Discretionary Access Control exist?","answer":"

      The two most common types of Discretionary Access Control are Access Control Lists (ACLs), which are tied to an object and specify user permissions, and Capability Lists, which are tied to a user and specify what objects they can access.<\/p>"},{"question":"What are some challenges related to Discretionary Access Control, and how are they mitigated?","answer":"

      A key challenge with DAC is the \"confused deputy problem,\" where a program can unintentionally leak access rights. This can be mitigated by careful programming and proper use of system privileges. Another problem is rapid, uncontrolled propagation of access rights, which can be addressed through proper education and training, as well as system-level controls.<\/p>"},{"question":"How does Discretionary Access Control compare to similar terms like Mandatory Access Control and Role-Based Access Control?","answer":"

      While DAC allows owners total control over their data, Mandatory Access Control (MAC) uses a centralized policy to restrict access based on classification levels, and Role-Based Access Control (RBAC) determines access based on a user's role within the organization.<\/p>"},{"question":"How might Discretionary Access Control evolve in the future?","answer":"

      The future of DAC is expected to evolve with the increasing popularity of cloud-based platforms and Internet of Things (IoT) devices. Fine-grained access control and DAC systems that can learn and adapt to changing access needs may become more common.<\/p>"},{"question":"How can proxy servers use Discretionary Access Control?","answer":"

      Proxy servers can use DAC principles to control access to web resources. A company might set up a proxy server that checks the user's identity and role before allowing access to certain websites or web-based services.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476853\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476854"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}